Chimney-cap



(No Model.)

J. KEANE.

` GHIMNBY GAP. No. 483,384. Patented Sept. 27, 1892.

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llimmlllllllillullmmiHmmmlimuulumluu i UNITED STATES PATENT OFFICE.

JOHN KEANE, OF SAN FRANCISCO, CALIFORNIA.

CHlMNEY-CAP.

SPECIFICATION forming part of Letters Patent No. 483,384, dated September 27,1892.

Application tiled February 15,1892. Serial No. 421,533. (No model.)

To all whom it may concern:

Be it known that I, JOHN KEANE, a citizen of the United States, residing in the city and county of San Francisco, State of California,

have invented certain new and useful Irnprovenients in Chimney-Caps, of which the following is a specification.

My invention relates to an improvementin the construction of caps or guards for chim- Io ney-tops and smoke-pipes; and it consists in the described construction and combination of parts, producing a cap or guard having a free unobstructed outlet and passage for the smoke anda complete protection of such outlet and passage from downdrafts and return currents of air, all as hereinafter fully explained and set forth.

The accompanying drawings illustrate two different sizes of guards constructed in accordance with my invention, one of which is designed for use on a smoke-pipe or a single- I'iue chimney and the other for a chimney having several fines. It also represents the parts of the guard in detail.

Figure l is an elevation of my improved guard constructed for a single flue, with the outer casing or body broken away to expose the interior. Fig. 2 represents the internal parts in detail and in section. Fig. 3 is an elevation of a guard intended for a chimney having several fiues, with the outside casing broken away in part to show the internal arrangement.

The guard for a single flue ora smoke-pipe is best made of cylindrical form; but where several iiues in one chimneyare to be protected the guard is made rectangular in form and of suitable breadth to cover all the iues.

The outer shell, casing, or body A is made of sheet metal with straight sides and a smooth interior surface. It is open at top and bottom and is of the same diameter or of the same width and breadth at top as at the bottom.

B is a tubular conductor in the bottom of the casing, extending below the rim of the casing at the bottom and for a short distance upward into the space above the rim. The

diameter or the area of this conductor at the lower end is about the same as that of the pipe or flue or the row of fines which is to be covered; but about midway in the length of this conductor a double conical deflectingplate B is placed around it, extending outward and reducing the area of the open space between the conductor and the casing. The apex or angle of this cone should be about in the same plane with the rim of the casing.

C is a detlecting-plate in the form of an inverted conical ring or flange fixed to or formed on the upper end of the conductor B and having about the same diameter or extent of projection as the conical deflecting-plate beneath it.

D is a deflecting-plate of about the same size as those below, butl set over the detlector C in reversed position, or inclining downward toward the surrounding casing. Its open top is surrounded by a short perpendicular rim D', and its lower edge is set above the rim of the conical deflector C to leave a clear space equal in height, atleast, tothe perpendicular height of the conical defiector.

E is a cap or top plate with an inclined or tapering top fixed in the center of the open top of the casing to coverthe central passage and the inclined deiiectors beneath. It extends outward to about the same distance from the surrounding casing as the deiiectors beneath, and it is supported clear of the casing by arms or brackets g,secured to the casing. The part D is supported in the same manner by the brackets 9*, and the casing itself is xed to the conductor by similar sup' ports g2. As many of these brackets or supports are used as the size and weight of the parts, the strength of wind to which the guard is exposed and other special conditions may seem to require.

Fig. 2 of the drawings represents the part-s B C D E removed from the casing, but occupying the same positions as when set in place in the casing. They may be taken to represent either vertical sections taken diametrically through the parts in the cylindrical casing or sections taken transversely through the corresponding parts in the rectangular casing, in which latter construction the width of the casing is determined by the size of the due; but the length is dependent upon the number of iiues in the chimney.

Having thus fully described my invention,

IOO

what I claim, and desire to secure by Lettere PatenhiS-m Y Y Y 1. The herein-described cap or guard for chimncyf1ues and smoke-pipes, consistingof the casing or body A, the central smoke-conductor B, inclined Ydeflectors B C, the top cap E, and the intermediate d'eector D',-ha'vin`g the perpendicularL rim D', the said parts being supported within the casing clearkot the Sides thereof, substantially as set forth.

2. In a cap or guard for chimney-lines, thev combination, with a central smokcfconduoting nu@ of passage; of the' snr'fmidig'asig' A, standing clear of the saine all arb'ulfl'; the inclined deflectors B B D, and the cap or top have hereunto set 

